A few days ago I spilled some water on my Dell Latitude D610 laptop. I dried the exterior off the best I could, and tried to power it on. It would turn on for about 7 seconds, then power back off. I put it in a bag of rice for about 48 hours, then tried to power it again. This time it didn't shut down, but it took a lot longer than usual to power up. About two Lord of the Rings extended editions later, it finally booted up. (Not really. It took about 10 minutes, though.) Anyway, an error message came up. It read:

"No bootable device-strike F1 to try again"

I read that if a computer says that, then the hard-drive crashed.
If I replace the hard-drive, then will my computer work properly again? Or did I ruin it for good when I turned it on without drying the inside of it?